Diagnostic Criteria and Clinical Considerations for Generalized Anxiety Disorder (GAD)

Definition and Core Features

• Generalized Anxiety Disorder is defined by excessive, uncontrollable worry about numerous everyday situations that persists for at least 6 months and is accompanied by at least three associated symptoms (only one symptom required in children), leading to clinically significant distress or functional impairment. 1
• The worry must be generalized across multiple domains (e.g., work, school, health) rather than confined to a single concern. 1

Core Diagnostic Criteria

Criterion A – Excessive Worry

• The patient experiences excessive anxiety and worry about a variety of events or activities on most days for ≥ 6 months. 1, 2

Criterion B – Associated Symptoms

• Diagnosis requires ≥ 3 of the following six symptoms (only 1 required for children):
  
  • Restlessness or feeling keyed up/on edge. 1
  • Fatigue (easily tired). 3

Criterion C – Clinical Significance

• The anxiety, worry, or physical symptoms produce clinically significant distress or impairment in social, occupational, or other important areas of functioning. 1, 2
• This reflects a dysfunction in psychological, biological, or developmental processes underlying mental functioning. 2

Criterion D – Exclusionary Criteria

• The presentation must not be attributable to the physiological effects of a substance (e.g., medication, drug of abuse) or another medical condition (e.g., hyperthyroidism). 1, 2
• The symptoms must not be better explained by another mental disorder (e.g., panic disorder, social anxiety disorder, OCD, PTSD, etc.). 1

Distinguishing GAD from Normal Developmental Anxiety

• GAD must be differentiated from normative developmental fears such as stranger anxiety in infants, separation concerns in toddlers, supernatural fears in preschoolers, safety worries in school‑aged children, and existential concerns in adolescents. 1, 2
• The key differentiators are the excessive, uncontrollable nature of the worry, its generalization across multiple domains, and the presence of clinically significant distress or functional impairment. 1, 2

Coding

• ICD‑10 code: F41.1 for Generalized Anxiety Disorder. 2

Duration Requirement

• The 6‑month duration criterion separates GAD from transient anxiety reactions. 1, 2

Cultural Considerations

• Somatic symptoms (e.g., palpitations, shortness of breath, dizziness, indigestion) are often more prominent in non‑Western cultures, even when not listed in DSM‑5 criteria. 3
• Bilingual individuals may emphasize somatic complaints when interviewed in certain languages (e.g., Spanish) versus psychological symptoms in English. 3
• The DSM‑5 focus on psychological worry may underidentify GAD in cultures where somatic presentations predominate. 3

Pediatric Considerations

• In children and adolescents, only one associated symptom (rather than three) is required for diagnosis. 1, 2
• Pediatric anxiety may manifest as crying, tantrums, freezing, or clinging. 1
• A developmentally sensitive interview approach is essential when assessing younger patients. 2

Common Pitfalls and Diagnostic Safeguards

• Do not diagnose GAD when the worry is better accounted for by another disorder (e.g., worry about panic attacks should be diagnosed as panic disorder). 4
• Rule out medical causes (e.g., hyperthyroidism, caffeine excess, hypoglycemia, pheochromocytoma, CNS disorders) before labeling anxiety as primary GAD. 2
• Assess for substance‑induced anxiety by establishing a clear temporal relationship between substance use and symptom onset. 2

When Full Criteria Are Not Met

• Use “Other Specified Anxiety Disorder” (F41.8) when the clinician can specify why full GAD criteria are not met. 4
• Use “Unspecified Anxiety Disorder” (F41.9) when no specific reason is provided or information is insufficient. 4